Well, so far I *DO* know that you can alter the switch's vertical position. but not some other tiles, because, for example if a tile has horizontal = 0 then it is just not given an h value.

Note that two tantalus dome tiles CANNOT share a tile, if two tiles are patched to use one space, the later apperaring tile will overwrite the earlier one [only one tile will be replaced] So, here are the dome tiles, as much as I can edit em:

You will note ALL tiles use $FE as their h position, so you'll have to take that into account when changing their position, $FC for the left tile is two tiles left of $FC for the right tile for example, a bit of trial and error will quickly fix this.

Also not the three upper dome tiles have two vertical position patches, this is because they don't have a v-position, rather a note that says 'For the next tile, go stay on this line' So, the first patch will lower all dome tiles including and after the patched tile one row, and ONLY one row. The second patch makes the upper dome tiles into 'lower' dome tiles by deleting the note, if you use the patch the tile simply won't be replaced, the lower dome tiles will overwrite them, however if you change it's h position then you will be able to see it. For example, using the 3 $90 patches and changing the $FE's to $FC, SIX tiles will appear on the same line as the bottom of the dome:

I hope these are useful in their way; please note that two of the h-position patches, if they're patched big [or small] enough, will cause the tiles to rise [or drop] several *vertical* lines. How many depends on how wide your level is. If it is 25 tiles wide, making the h-position 25 tiles less will make the tile move 1 row up.